● PITTSBURGH PIRATES VS LOUIS CARDINALS · THURSDAY, MAY 21, 2026

Pittsburgh Pirates vs Louis Cardinals Prediction

Bookie Bullies' AI-assisted prediction for Pittsburgh Pirates vs Louis Cardinals on Thursday, May 21, 2026. Made by MarcDuck with the assistance of AI software analyzing 35 factors per game. Pick: PIT.

Pittsburgh Pirates Starter
Braxton Ashcraft
ERA 3.09 · FIP-eff 3.09
Louis Cardinals Starter
Dustin May
ERA 4.81 · FIP-eff 4.19

Game Lines + Predictions

Predicted total6.8 R
Market O/U
Market run line
Moneyline
Model pickPIT

Park + Conditions

Venue: Busch Stadium. Park run factor: 0.98. The model adjusts the predicted total by both the flat park run factor (70% weight) and the hand-aware HR factor (30% weight) to capture park-by-batter-handedness effects on home runs.

Model Drivers

Active drivers behind this pick: sp_era. Each driver represents a factor pushing the same direction as the model's pick. More aligned drivers = higher confidence.

How This Prediction Was Made

The pick was made by MarcDuck with the assistance of AI software, not by AI alone. The AI weighs starting pitcher FIP/xFIP, bullpen quality, park factors by handedness, weather, lineup splits, recent form, line movement, and ~25 other factors. MarcDuck reviews the AI's output, refines edge cases (late injury news, narrative-driven line moves, weather updates), and formulates the final pick. Full methodology: /methodology.html.

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